Hello,I am looking for a device about the size of a cell phone that uses preferably AAA batteries or AA batteries that vibrates similar to a cell phone. (not actually a cell phone, just using a cell phone as an example) When standing vertically, and turned on, the device remains still. If you were to lay the device flat, it would vibrate at the highest level. If the device gets moved to a 45degree angle, it vibrates at half power. I would assume the device would use a similar vibrating mechanism as a normal cell phone, but would have to have some sort of gyroscope so it knows when its level to the ground or if its vertical. As a further example, lets say I have this device vertical on a table. If I turn the device on, and its vertical to the table, nothing will happen. As I tip the device slowly towards the table, the sensation of the vibration starts to get stronger and stronger until the device is laying flat on the table. Now the vibration should be at full power since its lying on the table or parallel to the table. (or possibly vibrate intermittently to save battery life). I'm not sure that this product exists, or if it would be easily developed. I just wanted to see if it would be available, or can be manufactured easily. I am now in the testing phase of an invention and this piece is crucial. Thank you Show More